What is particularly amazing is that from the time the sensor detects the collision to the time the air bag is fully inflated is only 30 milliseconds, or 0.03 second. The heat from this ignition starts the decomposition of the sodium azide and the generation of nitrogen gas to fill the air bag. These sensors send an electric signal to the canister that contains the sodium azide and the electric signal detonates a small amount of an igniter compound. What prompts an air bag to inflate by way of this reaction? There are sensors in the front of the automobile that detect a collision. So to minimize the danger of exposure, air bag manufacturers mix the sodium azide with other chemicals that will react with the sodium and, in turn, make less toxic compounds. Sodium is a very reactive metal that will react rapidly with water to form sodium hydroxide as a result, it would be quite harmful if it got into your eyes, nose or mouth. Notice that the other chemical into which sodium azide falls apart is Na, or sodium. 0.03 SECOND is all it takes to inflate an air bag.
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